How to know data size in UDP?

[Kazu Yamamoto ( 山本和彦 )]

Hello,

> If my understating is correct, I cannot use recvFrom since it calls
> recvfrom() with FFI. So, I use socketToHandle to translate a socket to
> a handle.

Sorry. This is my misunderstanding.

recvFrom does not stop other threads at least on UNIX. So, my problem
is solved.

--Kazu